Being realistic, it’s not something I see gaining adoption, mostly because HTCPCP is a joke protocol and isn’t a complete spec. Any internet-connected coffee machine nowadays would probably go through a ZigBee proxy or similar, and talk some proprietary format.
As I understand it, the prophecy is that when the state of Israel is fully unified once more, and the temple of Solomon is rebuilt, Jesus will return and the second battle of Armageddon will commence.
End of the world, rapture of the believers into Heaven, the whole bit.